OHN Senior Leadership

Meet Ochsner Health Network’s Steadfast Senior Leaders

These visionary leaders drive Ochsner Health Network’s mission to deliver a higher level of care, with greater access and lower costs, to our patients and the communities we serve.

David Carmouche, MD, President

Dr. Carmouche brought 19 years of progressive healthcare leadership experience in medicine and operations to the Ochsner Health Network. Previously, he served as Executive Vice President of External Operations and Chief Medical Officer at Blue Cross Blue Shield of Louisiana in Baton Rouge, where he successfully led important initiatives designed to organize care, improve quality and increase affordability.

He earned his bachelor of science degree in biology from Tulane University and his medical degree from LSU-New Orleans School of Medicine. Carmouche completed a residency in internal medicine at the University of Alabama at Birmingham as well as the Executive Program for Managing Health Care Delivery at the Harvard Business School.

Sabrina Heltz, Chief Operating Officer

As Chief Operating Officer, Heltz is responsible for the strategic planning and execution of analytics, network operations, care continuum management and commercial business development initiatives. Heltz joined OHN after a 31-year career at Blue Cross Blue Shield of Louisiana, where she last served as Senior Vice President of Medical Economics and Chief Analytics Officer.

During this time of unprecedented change in healthcare delivery and financing, she provides internal and external leadership critical to developing and implementing strategies that will reduce cost and improve healthcare quality in Louisiana, with a focus on payment and delivery system transformation and healthcare-related analytics.

Lisa Blume – Chief Financial Officer

A CPA and experienced financial executive with more than 20 years of leadership experience in finance, management, strategic planning, accounting and operations, Blume has held senior positions at provider-sponsored health plans, including serving as Vice President and Chief Financial Officer at Ochsner Health Plan, Inc. – a managed care organization with more than $700 million in annual revenues. In these roles, she directed all financial, treasury, analysis, underwriting, accounting, billing and enrollment functions.

A results-oriented professional, Blume has an extensive background in developing and implementing financial and operational strategies to improve processes, maximize return, reduce costs and increase productivity. She has built the finance function for start-up Medicare plans and has guided organizations through successful financial recovery. Blume has a bachelor of science degree in finance and accounting from the University of New Orleans.

Mary Armstrong, Vice President of Managed Care

Mary Armstrong, Ochsner Health System and Ochsner Health Network's Vice President of Managed Care, has been with Ochsner for 12 years. Mary joined Ochsner in July 2005 as Director of Managed Care, was promoted to AVP, and then promoted to Vice President in 2012. Prior to joining Ochsner, Mary held managed care leadership roles with Humana Health Benefit Plan of Louisiana, Ochsner Health Plan, CIGNA, and Healthsource/Provident. Mary holds a Bachelor in Economics from Centenary College and a Master of Health Services Administration from the University of Arkansas at Little Rock.

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